Lazy, that yellow coral in the right foreground is not a xenia. It's a hitchhiker soft coral of some kind that just showed up on that little piece of rock. There is a smaller colony to the left and another colony has popped up on a rock in the rear of the tank. I'll get a closer shot of it when I photograph the favia. I have no idea what it is, but it's a nice spot of color and I'm going to let it grow. The fact that a colony popped up elsewhere makes me wonder if it'll become a pest, so I'm watching it carefully.
Gary